On November 14, 2015, Michael Bublé joined Celine Dion in Las Vegas, to tape a segment for his special "Michael Bublé's Christmas in Hollywood". Celine sang "O Holy Night" and together they sang "Happy Xmas (Was is over)". The show was aired on December 10, 2015 at 8PM on NBC.
MICHAEL BUBLE’S CHRISTMAS IN HOLLYWOOD — Pictured: (l-r) Michael Buble, Celine Dion — (Photo by: David Becker/NBC/NBCU Photo Bank via Getty Images)
